Truss pad



Jan. 19,1926. 1,570,571 I T. J. LE CRAS TRUSS PAD Filed Jan. 12, 1922 I nventoz:

fw zA/aamg Patented Jan. 19, 1926.

UNITED STATES THOMAS J. LE CRAS, OF TORONTO, ONTARIO, CANADA.

TRUSS PAD.

Application filed January 12, 1922. Serial No. 528,757.

To all whom it may concern:

Be it known that I, THOMAS J. Lu CRAs, 1 subject of the King of Great Britain, and resident of the city of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Truss Pads, described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of this invention are to provide a hernial pad which may be easily and quickly removed from the backing plate in fitting and adjusting for size and style without interfering with other adjustments and which will enable the pad being readily removed, cleaned and replaced but will be secure against accidental removal.

A further object is to provide a pad which will be extremely flexible and resilient and will occupy the least possible space.

The principal feature of the invention consists in the novel formation of the resilient pad with a strong flexible beaded edge and of a back provided with an outwardly curved flange to interlock in the bead edge of the pad and presenting a concaved surface toward the pad.

In the drawings Figure 1 is a perspective view of my improved pad and back.

Figure 2 is a cross sectional view through the pad and back.

Figure 3 is a cross sectional view of the pad showing the manner of inserting the back plate therein.

It is important that hernial pads be made with considerable resiliency and it has been the custom in the manufacture of trusses to utilize springs which, in order to be sufliciently flexible, are of extraordinary length and are therefore cumbersome and disagreeable to wear. Further, it is important to provide a pad structure which will enable the interchange of various sizes and shapes in fitting without interfering with the other adjustments of the truss.

In the accomplishment of these conditions said flange being formed of a rubber material of a texture harder than the pad.

The flange 3 is formed with an underslde recess a extending completely around the inner side, which recess curves slightly upward into the flange.

The pad back 5 is formed of a single piece of light metal formed into a convexecl shape with an upwardly curved edge flange 6 extending therearound. This edge flange is adapted to fit into the recess 4 in the flange of the pad and it is inserted by springing the pad outwardly in the manner illustrated in Figure 8-. WVhen the pad is thus placed upon the back it will be held securely in place.

The concaved back provides a space between the pad and the metal plate consequently the fiat surface of the pad may curve outwardly if severe stress is placed on the pad or the truss. The utmost resiliency in the pad is thus obtained.

A truss pad such as described may be removed by simply pressing one edge away from the flanged edge of the back and then pulling the pad off and it may be just as easily replacetl by inserting the back into the flange recess at one side and stretching said flange over the back. The back is secured in any suitable manner to the truss, a curved spring arm 11 being herein shown screwed or riveted to the back.

What I claim as my invention is A truss pad comprising a back plate having an outwardly turned edge, and a cushion pad of resilient material having a flat back and a flange or rubber material encircling the back and curled inwardly to envelope the outturned flange of the back plate, said flange being capable of being rolled outwardly to disengage the flange of the back plate to enable its removal.

THOS. J. LE GRAS. 

